Which action is recommended to recover from a kernel panic loop?

• A. Reinstall the OS completely.
• B. Boot previous kernel from GRUB, capture logs, investigate drivers/firmware mismatches.
• C. Ignore logs and reboot.
• D. Upgrade the BIOS.

Answer: (B)

When a kernel panic loop happens, the quickest and most effective recovery is to boot a known-good kernel from the boot menu, then gather logs to pinpoint the cause. Reverting to a previous, stable kernel lets the system run with a known-good set of drivers and firmware, which helps you determine if the panic is tied to the newer kernel or its associated drivers. Once the system is running on that older kernel, collect diagnostic data such as dmesg output, kernel logs, and journal entries. These logs often reveal a specific driver or firmware mismatch that triggered the panic, guiding you to rollback or update the offending component to a compatible version.

From there, you can take targeted actions—reverting a problematic driver, applying a compatible firmware update, or applying a known fix—without the need for a full OS reinstall. Reinstalling the OS is too drastic for a first-step diagnosis and erases valuable logs. Ignoring logs and rebooting only masks the problem, leaving the root cause unresolved. A BIOS upgrade may be helpful in some hardware-related panic cases, but it’s riskier and should follow a confirmed diagnostic path rather than being attempted during a panic loop.